maintenance LEXUS UX250H 2019 Workshop Manual

3646-3. Do-it-yourself maintenance
1Turn the power switch off.
2 Open the glove box. Remove the
partition. ( P.294)
3 Remove the panel.
4 Unlock the filter cover ( ), pull
the filter cover out of the claws
( ), and remove the filter cover. 5
Remove the filter case.
6 Remove the air conditioning filter
from the filter case and replace it
with a new one.
The “ UP” marks shown on the filter and
the filter case should be pointing up.
■Checking interval
Inspect and replace the air conditioning fil-
ter according to the maintenance schedule.
In dusty areas or areas with heavy traffic
flow, early replacement may be required.
(For scheduled maintenance information,
please refer to the “Owner’s Manual Sup-
plement” or “Scheduled Maintenance”.)
■If air flow from the vents decreases dra-
matically
The filter may be clogged. Check the filter
and replace if necessary.
■Air conditioning filt er with deodorizing
function
When fragrances are placed in your vehi-
cle, the deodorizing effect may become
significantly weakened in a short period.
When an air conditioning odor comes out
continuously, replace the air conditioning
Air conditioning filter
The air conditioning filter must be
changed regularly to maintain air
conditioning efficiency.
Removing the air conditioning
filter
A
B

3656-3. Do-it-yourself maintenance
6
Maintenance and care
filter.
Remove the dust from the air intake
vent with a vacuum cleaner etc.
Make sure to only use a vacuum to suck
out dust and clogs. Attempting to blow out
dust and clogs using an airgun etc. may
push it into the air intake vent.
If dust and clogs cannot be completely
removed with the air intake vent cover
installed, remove the cover and clean
NOTICE
■When using the air conditioning sys-
tem
Make sure that a filter is always installed.
Using the air conditioning system without
a filter may cause damage to the system.
■To prevent damage to the filter cover
When moving the filter cover in the
direction of arrow to release the fitting,
pay attention not to apply excessive force
to the claws. Otherwise, the claws may
be damaged.
Cleaning the hybrid battery
(
traction battery) air intake
v
ent and filter
To prevent the fuel economy from
being affected, visually inspect the
hybrid battery (traction battery) air
intake vent periodically for dust and
clogs. If it is dusty or clogged or if
“Maintenance required for Traction
battery cooling parts See owner’s
manual” is shown on the multi-infor-
mation display, clean the air intake
vent using the following proce-
dures:
Cleaning the air intake vent
If dust and clogs cannot be com-
pletely removed

3666-3. Do-it-yourself maintenance
the filter.
1Turn the power switch off.
2 Using a Phillips screwdriver,
remove the clip.
3 Remove the air intake vent cover.
1 Pull the cover as shown in the illus-
tration to disengage the 5 claws,
starting from the claw in the upper
right corner.
2 Pull the cover toward the front of
the vehicle to remove it.
4 Remove the air intake vent filter.
1 Disengage the 1 claw as shown in the illustration.
2 Remove the filter from the cover.
5 Remove the dust and clogs from
the filter using a vacuum cleaner
etc.
Make sure to also remove the dust and
clogs from the inside of the air intake vent
cover.
6Reinstall the filter to the cover.
1 Engage the filter to the 2 claws as
shown in the illustration.
2 Engage the 1 claw to install the filter.
Make sure that the filt er is not crooked or
deformed when installing it.

3676-3. Do-it-yourself maintenance
6
Maintenance and care
7Install the air intake vent cover.
1
Insert the tab of the cover as shown
in the illustration.
2
Push the cover to engage the 5
claws.
8
Using a Phillips screwdriver, install
the clip.
■Scheduled maintenance of the air
intake vent is necessary when
In some situations such as when the vehicle
is used frequently or in heavy traffic or dusty
areas, the air intake vent may need to be
cleaned more regularly. For details, refer to
the “Warranty and Service Guide”,
“Owner’s Manual Supplement” or “Sched-
uled Maintenance”.
■Cleaning the air intake vent
●Dust in the air intake vent may interfere
with the cooling of the hybrid battery
(traction battery). If charging/discharging
of the hybrid battery (traction battery)
becomes limited, the distance that the
vehicle can be driven using the electric
motor (traction motor) may be reduced
and the fuel economy may be reduced. Inspect and clean the air intake vent peri-
odically.
●Improper handling of the air intake vent
cover and filter may result in damage to
them. If you have any concerns about
cleaning the filter, contact your Lexus
dealer.
■If “Maintenance required for Traction
battery cooling parts See owner’s man-
ual” is shown on the multi-information
display
●If this warning message is shown on the
multi-information display, remove the air
intake vent cover and clean the filter.
(
 P.365)
●After cleaning the air intake vent, start
the hybrid system and check that the
warning message is no longer shown. It
may take approximately 20 minutes after
the hybrid system is started until the
warning message disappears. If the warn-
ing message does not disappear, have the
vehicle inspected by your Lexus dealer.
WARNING
■When cleaning the air intake vent
●Do not use water or other liquids to
clean the air intake vent. If water is
applied to the hybrid battery (traction
battery) or other components, a mal-
function or fire may occur.
●Before cleaning the air intake vent,
make sure to turn the power switch off
to stop the hybrid system.
■When removing the air intake vent
cover
Do not touch the service plug located
near the air intake vent. ( P.66)

3686-3. Do-it-yourself maintenance
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart access system with push-but-
ton start and wireless remote control will
not function properly.
●The operational range will be reduced.
■When the card key battery needs to be
replaced (if equipped)
The battery for the card key is available only
at Lexus dealers. Your Lexus dealer can
replace the battery for you.
Prepare the following before replacing
the battery:
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032
■Use a CR2032 lithium battery
●Batteries can be purchased at your Lexus
dealer, local electrical appliance shops or
camera stores.
●Replace only with the same or equivalent
type recommended by the manufacturer.
●Dispose of used batteries according to
the local laws.
NOTICE
■When cleaning the air intake vent
When cleaning the air intake vent, make
sure to only use a vacuum to suck out
dust and clogs. If a compressed air blow
gun, etc. is used to blow out dust and
clogs, the dust or clogs may be pushed
into the air intake ve nt, which may affect
the performance of the hybrid battery
(traction battery) and cause a malfunc-
tion.
■To prevent damage to the vehicle
●Do not allow water or foreign matter to
enter the air intake vent when the
cover is removed.
●Carefully handle the removed filter so
that it will not be damaged. If the filter
is damaged, have it replaced with a
new filter by your Lexus dealer.
●Make sure to reinstall the filter and
cover to their original positions after
cleaning.
●Do not install anything to the air intake
vent other than the exclusive filter for
this vehicle or use the vehicle without
the filter installed.
■If “Maintenance required for Traction
battery cooling parts See owner’s
manual” is shown on the multi-infor-
mation display
If the vehicle is continuously driven with
the warning message (indicating that
charging/discharging of the hybrid bat-
tery [traction battery] may become lim-
ited) displayed, the hybrid battery
(traction battery) may malfunction. If the
warning message is shown, clean the air
intake vent immediately.
Electronic key battery
Replace the battery with a new one
if it is depleted.
Items to prepare

3696-3. Do-it-yourself maintenance
6
Maintenance and care
1Take out the mechanical key.
2
Remove the cover.
To prevent damage to the key, cover the tip
of the flathead screwdriver with a tape.
3Remove the depleted battery using
the small flathead screwdriver.
Insert a new battery with the “+” terminal
facing up.
Replacing the batteryWARNING
■Removed battery and other parts
These parts are small and if swallowed by
a child, they can cause choking. Keep
away from children. Failure to do so
could result in death or serious injury.
NOTICE
■When replacing the battery
Use a screwdriver of appropriate size.
Applying excessive force may deform or
damage the cover.
■For normal operation after replacing
the battery
Observe the following precautions to
prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to
rust.
●Do not touch or move any other com-
ponent inside the remote control.
●Do not bend either of the battery ter-
minals.

3706-3. Do-it-yourself maintenance
1Turn the power switch off.
2 Open the fuse box cover.
Engine compartment: type A fuse
box
Push the tab in and lift the lid off.
Engine compartment: type B fuse
box
Push the tab in and lift the lid off.
Left side instrument panel
Remove the lid.
Luggage compartment
Remove the 12-volt battery cover
( P.343) and push the tab in and lift the
lid off.
3 Remove the fuse.
Only type A fuse can be removed using the
pullout tool.
4Check if the fuse is blown.
Replace the blown fuse with a new fuse of
an appropriate amperage rating. The
amperage rating can be found on the fuse
box lid.
Checking and replacing
fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses

3716-3. Do-it-yourself maintenance
6
Maintenance and care
Type ANormal fuse
Blown fuse
Type BNormal fuse
Blown fuse
Type CNormal fuse
Blown fuse
Type DNormal fuse
Blown fuse
■After a fuse is replaced
●When installing the lid, make sure that the
tab is installed securely.
●If the lights do not turn on even after the
fuse has been replaced, a bulb may need
replacement. ( P.374)
●If the replaced fuse blows again, have the
vehicle inspected by your Lexus dealer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting
the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine
Lexus products designed for this vehicle.
Because certain bulbs are connected to cir-
cuits designed to prevent overload, non-
genuine parts or parts not designed for this
vehicle may be unusable.
A
B
A
B
A
B
WARNING
■To prevent system breakdowns and
vehicle fire
Observe the following precautions.
Failure to do so may cause damage to
the vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage
rating than that indicated, or use any
other object in place of a fuse.
A
B

3726-3. Do-it-yourself maintenance
Single-beam headlightsAdjustment bolt A
Adjustment bolt B
Triple-beam headlightsAdjustment bolt A
Adjustment bolt B
 Make sure the vehicle has a full tank
of gasoline and the area around the
headlight is not deformed.
 Park the vehicle on level ground.
 Make sure the tire inflation pressure
WARNING
●Always use a genuine Lexus fuse or
equivalent.
Never replace a fuse with a wire, even
as a temporary fix.
●Do not modify the fuses or fuse boxes.
■Fuse box near the power control unit
Never check or replace the fuses as
there are high voltage parts and wiring
near the fuse box.
Doing so may cause electric shock,
resulting in death or serious injury.
NOTICE
■Before replacing fuses
Have the cause of electrical overload
determined and repaired by your Lexus
dealer as soon as possible.
Headlight aim
Vertical movement adjusting
bolts
Before checking the headlight
aim
A
B
A
B

3736-3. Do-it-yourself maintenance
6
Maintenance and care
is at the specified level.
 Have someone sit in the driver’s
seat.
 Bounce the vehicle several times.
1 Using a Phillips-head screwdriver,
turn bolt A in either direction.
Remember the turning direction
and the number of turns.
Single-beam headlights
Triple-beam headlights
2 Turn bolt B the same number of
turns and in the same direction as
step 1.
If the headlight cannot be adjusted using
this procedure, take the vehicle to your
Lexus dealer to adjust the headlight aim.
Single-beam headlights
Triple-beam headlights
Adjusting the headlight aim